67679

Properties

Appears in sequences

• Numbers whose least quadratic nonresidue (A020649) is 19.at n=29A025027
• Smallest prime of the form concatenation of prime(n) with itself followed by a 9, or 0 if no such prime exists.at n=18A092995
• Primes with minimal digit = 6.at n=34A106106
• Prime numbers generated by concatenating k, k, and 9.at n=12A210514
• Primes having only {6, 7, 9} as digits.at n=26A261184
• Triangle read by rows: T(n,k) is the number of oriented colorings of the facets of a regular n-dimensional orthotope using exactly k colors. Row n has 2n columns.at n=35A325008
• a(n) is the least prime p such that there are exactly n pairs of primes (q,r) with p > q > r such that q | r + p and r | q + p.at n=13A344776
• Prime numbersat n=6741